The Denver Post reports authorities were called to the home at about 9:30 p.m. Friday and found the victim with non-life-threatening injuries. The older boy is being held for investigation of theft and possession of a gun by a minor.

Police Detective Ryan Mckone says the boys found a handgun in the home, and the older boy accidentally fired a shot while the two were playing with the weapon. Mckone added that it appears adults were in the home at the time.